The SATA DVD drive is mounted in a removable module that is accessed from the system's front panel. The DVD module must be removed from the drive cage in order to service the drive backplane.
The DVD drive is automatically disabled if you install a SAS PCIe RAID HBA, as described in PCIe Card Configuration Rules. Use of this card precludes using the DVD drive. You do not need to physically remove the disabled DVD drive from the server to use the SAS PCIe RAID HBA.